OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Twin Primes.
FORMULA
a(n) = Sum_{k=1..n} (-1)^(k+1) * A001097(k).
a(2*n-1) = 2*n+1.
CROSSREFS
KEYWORD
sign,new
AUTHOR
Ilya Gutkovskiy, Oct 08 2024
STATUS
approved